Are you looking to determine the value or just the presents of one.

First you need to put a magnetic dector to keep the Slugs out of the way.

Next a simple optical circuit to indicate one is in the chute. to determine

which value you have that can be done by different size chutes.

I hope this helps.

Oh don't forget to time the pulse on the optics to prevent the tape and
string

drop coins.

Thanks



Tom Wrenn
K4BQE

e-mail: tom@t2allc.com

----- Disclaimer -----
 The information contained in this e-mail, and in any accompanying
documents,
 may constitute confidential and/or legally privileged information.  The
 information is intended only for use by the designated recipient.  If you
are
 not the intended recipient (or responsible for the delivery of the message
to the
 intended recipient), you are hereby notified that any dissemination,
 distribution, copying, or other use of, or taking of any action in reliance
on
 this e-mail is strictly prohibited. If you have received this email
 communication in error, please notify the sender immediately and delete the
 message from your system.



-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Hopkins
Sent: Thursday, February 19, 2004 12:57 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: Coin detector circuit


As in a vending machine or as a metal detector?
*************************************************

Roy Hopkins   :-)

*************************************************

----- Original Message -----
From: "Gabriel Caffese" <gcaffese@HOTPOP.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Thursday, February 19, 2004 3:01 PM
Subject: [EE]: Coin detector circuit


> Hello everyone,
>
>     As my analog electronics is not very good, am looking for a simple
> circuit for detecting coins.
>     Does anyone have a simple one ???
>
>
>     Thanks in advance,
>
>            Gabriel Caffese.-
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.
>


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.592 / Virus Database: 375 - Release Date: 18/02/2004

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body

--
http://www.piclist.com hint: To leave the PICList
mailto:piclist-unsubscribe-request@mitvma.mit.edu